Lighting Device

ABSTRACT

A luminous device ( 10 ) comprising at least one reflector ( 6 ) and comprising at least one luminous module ( 1 ) which has at least one radiation-emitting semiconductor component ( 3 ) and a component carrier ( 2 ) having at least one mounting area ( 4   a,    4   b ) on which the radiation-emitting semiconductor component ( 3 ) is mounted. The luminous module ( 1 ) is connected to the reflector ( 6 ) in a connection plane (V) defined by points of contact between the component carrier ( 2 ) and the reflector ( 6.  The mounting area ( 4   a,    4   b ) extends obliquely with respect to the connection plane (V).

Different variants of a luminous device are described in the presentcase, wherein the luminous device has at least one luminous module.

This patent application claims the priority of German patent applicationNo. 102007043903.4, the disclosure content of which is herebyincorporated by reference.

The patent specification DE 199 09 399 C1 discloses a flexible LEDmultiple module suitable for incorporation into luminaire housings, inparticular for motor vehicles. The LED multiple module has a pluralityof LEDs mounted onto rigid circuit boards.

In the present case, one object to be achieved consists in specifying aluminous device having improved optical properties. This object isachieved by means of a luminous device in accordance with patent claim1.

Advantageous developments of the luminous device are specified in thedependent patent claims.

In accordance with one preferred variant of the invention the luminousdevice comprises at least one reflector and at least one luminous modulewhich has at least one radiation-emitting semiconductor component and acomponent carrier having at least one mounting area on which theradiation-emitting semiconductor component is mounted, wherein theluminous module is connected to the reflector in a connection planedefined by points of contact between the component carrier and thereflector, wherein the mounting area extends obliquely with respect tothe connection plane.

Preferably, a planar area extending parallel to the connection plane andthus obliquely with respect to the mounting area of the componentcarrier is illuminated by means of the radiation generated by theluminous module.

Radiation generated by means of an oblique arrangement of this typepreferably forms an angle of greater than 0° and less than 90° with thearea normal to the planar area to be illuminated. In comparison with aconventional flat arrangement with perpendicular incidence of radiation,in the present case the path length of the radiation as far as theplanar area to be illuminated is larger. This advantageously resultsoverall in better intermixing of the radiation from adjacentsemiconductor components and thus an improved radiation homogeneity.

In one advantageous configuration of the luminous device, the luminousmodule is arranged within the reflector. In this way, in particular, theradiation generated by the individual semiconductor components of theluminous module can be reflected by means of the reflector. Preferably,the radiation is reflected a number of times in the reflector, with theresult that the distance covered by the radiation in the reflector isincreased. This, too, results in better intermixing of the radiation,that is to say that the radiation homogeneity of the radiation emittedby the luminous device is improved.

In comparison with a luminous device without a reflector, the presentluminous device can be produced with a relatively small structural depthsince a sufficient radiation homogeneity can be obtained by means of thereflector even with a smaller structural depth.

Furthermore, the radiation generated by the individual semiconductorcomponents of the luminous module can be concentrated by means of thereflector. By way of example, a radiation cone generated by the luminousdevice can be restricted to a predetermined aperture angle by means ofthe reflector.

Furthermore, the reflector can reflect the radiation emitted by theluminous module in a main emission direction. Preferably, the mainemission direction extends parallel to the area normal to the planararea to be illuminated.

In accordance with one preferred variant, a cross-sectional area of thereflector which extends parallel to the connection plane becomes largerin the main emission direction. This means that the reflector has a formthat opens upward, that is to say in the main emission direction.

In accordance with a further preferred variant, the reflector has asymmetrical cross-sectional form in at least one plane arrangedperpendicular to the connection plane. By way of example, thecross-sectional form can be a parabola segment or a parabola, an ellipsesegment, or a hyperbola segment. The surface of the reflector cantherefore be curved at least in places. However, the surface can also beat least partly or completely planar. In particular, the cross-sectionalform can be a trapezoid segment.

In the case of a symmetrical embodiment of the reflector, the luminousmodule is preferably arranged on an axis of symmetry of the reflector.Particularly preferably, the axis of symmetry is parallel to the mainemission direction.

In one advantageous configuration of the luminous device, the reflectoris embodied in specularly reflective fashion, that is to say that thereflector reflects the radiation in such a way that the angle ofreflection is equal to the angle of incidence. In this case, thereflector can have a smooth metal surface. However, it is also possiblefor the reflector to be diffusely reflective. In this case, thereflector can have a surface having scattering centers, for example aroughened surface wherein the scattering centers can reflect theradiation in all spatial directions.

In accordance with one preferred embodiment, the reflector is formedfrom a plastic film. Such an embodiment of the reflector permits arelatively light design of the reflector. In particular, plastic film isa thermal film that can be brought to the desired form upon heating.

Preferably, the reflector encloses a cavity in which the luminous moduleis arranged, that is to say that the reflector is not embodied as asolid body. The reflector has an advantageously low weight as a result.

Furthermore, the surface of the reflector does not have to be a closedarea, but rather can have an opening at the base, for example, in whichthe luminous module is arranged. In particular, the luminous module isarranged in such a way that the base opening of the reflector is closedby the luminous module.

In accordance with a further variant, the reflector is coated with aphosphor. The phosphor can convert at least one part of the radiationoriginating from the semiconductor components into radiation having ahigher wavelength. By mixing the original radiation with the convertedradiation, it is possible to generate mixed-colored light, in particularwhite light. It is possible to use phosphors of different types, suchthat diverse color mixtures and color temperatures can be obtained.Suitable phosphors, such as a YAG:Ce powder, for instance, are describedfor example in WO 98/12757, the content of which in this respect ishereby incorporated by reference.

The entirety of the semiconductor components of the luminous module cangenerate identically colored light. However, it is also conceivable forat least two semiconductor components to generate radiation of differentcolors. Mixed-colored light, in particular white light can thereby begenerated. By way of example, the luminous module can have a firstcomponent emitting red light, a second component emitting green light,and a third component emitting blue light. By means of a combination ofdifferent-colored components, it is possible to obtain a comparativelygood color rendering index. Furthermore, the white point can be shiftedby means of different mixing of red, green and blue light.

Semiconductor components which are surface-mountable are suitable forthe luminous module. Semiconductor components of this type permit simplemounting thereof and thus contribute to reducing the productioncomplexity for the luminous module. Each semiconductor componenttypically has a housing body, in which at least one radiation-emittingsemiconductor body is arranged. A semiconductor component which issuitable in the context of the invention is known from the document WO02/084749 A2, the content of which is hereby incorporated by reference.

In one advantageous configuration of the luminous device, the luminousmodule comprises a component carrier having at least one first and onesecond mounting area which extend obliquely with respect to one another.As an alternative, the two mounting areas can also extend parallel toone another. In this case, the component carrier is embodied inparallelepipedal fashion, in particular.

Furthermore, the first mounting area and the second mounting area canform the same angle with the connection plane. However, it is alsoconceivable for the mounting areas to form different angles with theconnection plane. Advantageously, it is possible to homogeneouslyilluminate an area in an edge region, too, if the luminous device has,in the edge region, a luminous module in which the mounting areas formdifferent angles with the module carrier. A luminous module arranged inthe inner region, by contrast, preferably has in this case mountingareas which form the same angle with the module carrier.

The component carrier firstly serves for fixing the components.Secondly, the component carrier can have, for interconnecting thecomponents, conductor track structures and electrical connections whichare connected to a power supply. In particular the component carrier hasat least one circuit board, wherein the mounting area is the surface ofthe circuit board. The component carrier can consist solely of a circuitboard, which is bent in such a way that at least two surfaces of thecircuit board extend obliquely with respect to one another. As analternative, the component carrier can have a holder having at least twosurfaces extending obliquely with respect to one another, wherein acircuit board is fixed on at least one surface. The holder preferablycontains a metal and particularly preferably consists of aluminum orcopper. A suitable circuit board is a metal-core circuit board, forexample, which provides for comparatively good cooling of the luminousmodule. Furthermore, the circuit board can have plated-through holes forthe purpose of conducting heat. The circuit board can be a flexiblecircuit board which can be easily adapted to the form of the holder.

In accordance with one preferred configuration of the luminous device,the component carrier has the form of a polyhedron. In this case it isnot necessary for the form of the component carrier to produce a closedpolyhedron form. Rather, the form of a polyhedron can be indicated bythe component carrier. Preferred polyhedra are prism, tetrahedron,pyramid or parallelepiped, for example.

In accordance with a further preferred configuration of the luminousdevice, the at least one mounting area of the component carrier isarranged parallel to a boundary face of the polyhedron.

In one advantageous variant of the luminous device, the componentcarrier is a frame provided for guiding a cooling fluid flow or forarranging a cooling element. In the present case, fluid should beunderstood to mean a liquid or a gas. By way of example, the fluid flowcan be an air flow that is brought about by convection or by means of afan. The heat that arises during the operation of the luminous modulecan thereby be advantageously dissipated to the surroundings. Aplurality of cooling fins, for example, are suitable as cooling element.

In accordance with one preferred embodiment, the luminous device has aplurality of reflectors, wherein at least one luminous module isarranged respectively in a reflector. Upon illumination of a planararea, a partial region of the area can be illuminated by means of a unitcomposed of reflector and luminous module, said partial region beingreferred to hereinafter as luminous segment. Preferably, the at leastone luminous module (arranged in one reflector) is in each caseelectrically driveable independently of the luminous modules arranged inthe other reflectors. It is thereby possible to produce on the planararea individual luminous segments which produce, by way of example, aline-by-line or rectangular illumination of the area to be illuminated.Suitable aspect ratios of a rectangular luminous segment are 16:9 or4:3, for example. A contour of the reflector can accordingly have saidaspect ratios. The aspect ratios are advantageously adapted toconventional screen formats. As a result the luminous device canoptimally be used for backlighting a screen, for example an LCD (liquidcrystal display). The screen, in general terms a backlighting element,is disposed downstream of the reflector.

Furthermore, a covering plate can be disposed downstream of thereflector. Said covering plate is typically situated before thebacklighting element in the main emission direction. The covering platecan be provided, in particular, for protecting the luminous module fromdamage. Furthermore, the covering plate can be a diffuser, whereby theradiation is intermixed better. The covering plate can bear on thereflector and thereby be stabilized by means of the reflector. This hasthe consequence that the bearing points can be discerned as boundariesbetween the luminous segments of the area to be illuminated. Bycontrast, in the alternative embodiment, wherein the covering plate isspaced apart from the reflector, no boundaries can be seen.

In the present case, it is advantageous if the mounting area extendsobliquely with respect to a main area of the backlighting element. Inthis case, the mounting area of the component carrier forms an angle ofgreater than 0° and less than or equal to 90° with the main area of thebacklighting element. In this case, the main area is the planar area tobe illuminated.

Further preferred features, advantageous configurations and developmentsand also advantages of a luminous device according to the invention willbecome apparent from the exemplary embodiments explained in greaterdetail below in association with FIGS. 1 to 15.

In the figures:

FIG. 1 shows a schematic cross-sectional view of a first exemplaryembodiment of a luminous device according to the invention,

FIG. 2 shows a perspective view of the exemplary embodiment illustratedin FIG. 1,

FIG. 3 shows a schematic perspective view of a first exemplaryembodiment of a preferred luminous module,

FIG. 4 shows a schematic perspective view of a second exemplaryembodiment of a preferred luminous module,

FIG. 5 shows a schematic perspective view of a third exemplaryembodiment of a preferred luminous module,

FIG. 6 shows a schematic perspective view of a fourth exemplaryembodiment of a preferred luminous module,

FIG. 7 shows a schematic cross-sectional view of a second exemplaryembodiment of a luminous device according to the invention,

FIG. 8 shows a perspective view of the exemplary embodiment illustratedin FIG. 7,

FIG. 9 shows a schematic plan view of a third exemplary embodiment of aluminous device according to the invention,

FIG. 10 shows a further schematic plan view of the exemplary embodimentillustrated in FIG. 9,

FIG. 11 shows a schematic perspective view of a unit of a fourthexemplary embodiment of a luminous device according to the invention,

FIG. 12 shows a further schematic perspective cross-sectional view ofthe exemplary embodiment illustrated in FIG. 11,

FIG. 13 shows a schematic cross-sectional view of a unit of a fifthexemplary embodiment of a luminous device according to the invention,

FIG. 14 shows a schematic cross-sectional view of a sixth exemplaryembodiment of a luminous device according to the invention,

FIG. 15 shows a schematic cross-sectional view of a seventh exemplaryembodiment of a luminous device according to the invention.

FIGS. 1 and 2 illustrate a luminous device 10 comprising a plurality ofluminous modules 1 and reflectors 6. A luminous module 1 having aplurality of semiconductor components 3 is arranged in each reflector 6,wherein the semiconductor components 3 are mounted on a componentcarrier 2. In particular, the semiconductor components 3 are arranged onside areas of the component carrier 2, which is embodied like atruncated pyramid, which side areas thus serve as mounting areas 4 a and4 b.

The mounting areas 4 a and 4 b extend obliquely with respect to aconnection plane V defined by points of contact between the componentcarrier 2 and the reflector 6. The connection plane V is preferablyarranged parallel to a bearing area of the luminous device 10. Themounting area forms the angle γ with the connection plane V, where0°<γ≦90° holds true. The angle φ formed by the mounting area. 4 b withthe connection plane V can be 0°<φ≦90°. The angle γ and the angle φ canbe different or equal in magnitude.

Radiation generated by the semiconductor components 3 impinges for themost part on the reflector 6 and is preferably reflected in the mainemission direction H. In comparison with a conventional arrangementhaving an emission direction parallel to the main emission direction H,in the present case the path length of the radiation as far as a planararea to be illuminated is larger. This advantageously results overall inbetter intermixing of the radiation and thus an improved radiationhomogeneity on the planar area. The planar area is preferably a mainarea of a backlighting element 8.

As can be discerned in FIG. 5, the reflector 6 is embodied symmetricallywith respect to an axis of symmetry S extending perpendicular to theconnection plane V. The luminous module 1 is advantageously arranged onthe axis of symmetry S. The cross-sectional form of the reflector 6constitutes a parabola segment in this exemplary embodiment.

The reflector 6 is arranged at the longitudinal sides of the luminousmodule 1. The luminous device 10 has no reflector at the broad sides ofthe component carrier 3. Further luminous devices can be arranged hereinstead, such that the reflectors arranged one behind another produce agrooved form which enables line-by-line illumination of a planar area.

In the case of a relatively flat reflector 6, as illustrated in FIGS. 1and 2, the reflector 6 does not reach as far as the covering plate 7,which is a diffuser, for example. The radiation from adjacent luminousmodules 1 can thus mix, as a result of which upper edges 9 of thereflector 6 cannot be discerned by an observer.

FIGS. 3 to 6 illustrate luminous modules which are particularly suitablefor the luminous device described in the present case.

The luminous module 1 illustrated in FIG. 3 has a component carrier 2and a plurality of semiconductor components 3, wherein the semiconductorcomponents 3 are arranged on a first mounting area 4 a and a secondmounting area 4 b of the component carrier 2. As denoted in FIG. 3, thefirst mounting area 4 a and the second mounting area 4 b extendobliquely with respect to one another, that is to say that they form anangle δ, where 0°<δ<180° holds true.

Thus, the component carrier 2 is embodied in angular fashion in theexemplary embodiment illustrated, such that a cavity 5 is present belowthe component carrier 2, in which cavity a cooling element, for example,can be arranged. The component carrier 2 can be embodied as one part orin multipartite fashion. Preferably, for producing a multipartitecomponent carrier 2, circuit boards are joined together, such that thecircuit boards form the angle δ. Preferably, the circuit boards are thenarranged on a holder (not illustrated). The respective surfaces of thecircuit boards then form the mounting areas 4 a and 4 b of the componentcarrier 2. The circuit boards are metal-core circuit boards, inparticular, which provide for good cooling of the luminous module 1.

Furthermore, the two mounting areas 4 a and 4 b extend obliquely withrespect to a bearing area (depicted by dashed lines) of the componentcarrier 2. In this case, the mounting area 4 a forms an angle γ with thebearing area, where 0°<γ<90° holds true. The angle φ formed by themounting area 4 b with the bearing area can be 0° <φ<90°. The angle γand the angle φ can be different or equal in magnitude.

FIG. 4 shows a luminous module 1 having a tetrahedral component carrier2. The component carrier 2 has three side walls with triangular mountingareas 4 a, 4 b, 4 c. The respective mounting areas 4 a, 4 b, 4 c extendobliquely with respect to a bearing area illustrated in hatched fashion.Furthermore, the mounting areas 4 a, 4 b, 4 c also extend obliquely withrespect to one another. A respective semiconductor component 3 ismounted on the mounting areas 4 a, 4 b, 4 c. By way of example, thesemiconductor components 3 can be a red, a blue and a greenlight-emitting diode, such that the luminous module 3 emits white lightoverall. The arrangement is advantageously space-saving and additionallyprovides for good intermixing of the different-colored light.

The component carrier 2 is not embodied as a closed tetrahedron, butrather has a cavity on a side facing the bearing area, in which cavity acooling element, for example, can be arranged.

In the case of the luminous module 1 illustrated in FIG. 5, thecomponent carrier 2 of the luminous module 1 has the form of a pyramid.The component carrier 2 lacks the base area, such that only the mountingareas 4 a, 4 b, 4 c, 4 d are present. Consequently, the componentcarrier 2 is not embodied as a closed pyramid. The component carrier 2encloses a cavity, in which a cooling element, for example, can bearranged.

FIG. 6 shows a luminous module 1 having a parallelepipedal componentcarrier 2. In this case, for the mounting of the semiconductorcomponents 3, two side areas arranged parallel to one another areprovided rather than the main area of the component carrier 2, whichside areas thus serve as mounting areas 4 a and 4 b.

A luminous device 10 having relatively high reflectors 6 is illustratedin FIGS. 7 and 8, in contrast to the luminous device shown in FIGS. 1and 2. In this case, the reflectors 6 extend as far as the coveringplate 7. In particular, the reflectors 6 serve as supports for thecovering plate 7, wherein the covering plate 7 bears on the upper edges9 of the reflectors 6. As a result, the covering plate 7 is stabilizedoverall.

In this exemplary embodiment, the upper edges 9 touching the coveringplate 7 form a boundary between adjacent luminous segments LS which isperceptible to an external observer. This is because the radiationintermixes more poorly at said boundaries than in regions between theupper edges 9.

The luminous segments LS arise as a result of the illumination of aplanar area by means of a unit composed of a reflector 6 and at leastone luminous module 1 arranged in the reflector 6. Since the reflector 6in the present exemplary embodiment delimits the luminous module 1 onlyon two sides, the planar area can be illuminated line by line by aluminous module 1 arranged in a respective reflector 6. A prerequisitefor this is that the luminous modules in the individual reflectors canbe driven separately.

As revealed by FIGS. 7 and 8, the component carrier 2 has a form asdescribed in greater detail in FIG. 3. This form has the effect that thecomponents 3 which are arranged on the mounting area 4 a are at asmaller distance from the components 3 which are arranged on themounting area 4 b than is the case for the component carrier 2 of theexemplary embodiment in FIGS. 1 and 2.

Any desired luminance and color homogeneity can be set by means of thedistance between the components which are arranged on different mountingareas.

FIGS. 9 and 10 show a luminous device 10 having a plurality ofreflectors 6 which surround on all sides the luminous modules 1 arrangedin the reflectors 6. The contours of the reflectors 6 at the top sideare rectangular, with the result that rectangular luminous segmentsrespectively arise during the illumination of a planar area. Suitableaspect ratios of a rectangular luminous segment are 16:9 or 4:3, forexample. The contour of the reflector 6 can accordingly have said aspectratios. The aspect ratios are advantageously adapted to conventionalscreen formats.

Preferably, in this exemplary embodiment, the'luminous module 1 arrangedin a reflector 6 can be driven separately from a luminous module 1arranged in an adjacent reflector 6.

The luminous device 10 can be composed of individual units of plug-typedesign. Here, an individual unit comprises in each case a reflector 6and at least one luminous module 1 arranged in the reflector 6.Furthermore, the unit comprises the electrical connections required. Aluminous device of desired size can be constructed in this way. Sincethe units preferably have aspect ratios adapted to conventional screenformats, it is possible to produce a luminous device which, by virtue ofits aspect ratios, is particularly suitable for backlighting a screen.

FIG. 11 illustrates a detailed complete view and FIG. 12 a detailedcross-sectional view of a preferred unit.

The unit comprises a reflector 6 and a luminous module surrounded on allsides by the reflector 6. The reflector 6 has an opening at the base, inwhich opening the luminous module 1 is arranged. In particular, thecomponent carrier 2 closes off the opening at the base. The reflector 6can be formed from a thermoformed plastic film.

The component carrier 2 has in cross section a trapezoid form and thusside areas extending obliquely with respect to one another which serveas mounting areas 4 a and 4 b.

The mounting areas 4 a and 4 b furthermore extend obliquely with respectto a connection plane (not illustrated) in which the luminous module 1touches the reflector 6, and moreover obliquely with respect to a planarmodule carrier 12, on which the luminous module 1 is mounted. Acomparatively good intermixing of the radiation generated by thesemiconductor components 3 can be obtained as a result of the obliquearrangement of the semiconductor components 3 in the reflector 6. Thesemiconductor components 3 can have a plurality of semiconductor bodies,as illustrated.

As a result of the angular form of the component carrier 2, a cavity 5is formed between said component carrier and the module carrier 12. Acooling element can be arranged in the cavity 5 which cooling element ispreferably in direct contact with the component carrier 2, such that theheat that arises during operation can be dissipated directly. Thecooling element 8 can be a cooling fin or a metal block which containscopper, in particular.

The component carrier 2 can be embodied as one part or in multipartitefashion. Preferably, for producing a multipartite component carrier 2,circuit boards are joined together. Particularly preferably, the circuitboards are then arranged on a hub (not illustrated). The circuit boardsare metal-core circuit boards, in particular, which provide for goodcooling of the luminous module 1. Furthermore, the circuit boards can beflexible, such that they can easily be bent and can thus assume anypossible form. In addition to the semiconductor components 3, theluminous module 1 can have a sensor unit 11. By means of the sensor unit11, the radiation emitted by semiconductor components 3 can be detectedand set in accordance with the desired emission characteristic.

As is illustrated in FIG. 13, cable guides 13 provided for theelectrical connection of the luminous module 1 can be accommodated incavities 14 present between the component carrier 2 and the reflector 6.

FIG. 14 illustrates how a luminous device 10 can be constructed byjoining together a plurality of units.

FIG. 15 is intended to illustrate a possible use of the cavity 5 belowthe component carrier 2 for cooling the luminous module 1. In accordancewith the exemplary embodiment illustrated, the cooling is effected bymeans of cooling fins 15 which are arranged directly at the componentcarrier 2 and project into the cavity 5. Additional cooling can beeffected by means of an air flow guided through the cavity 5.

The invention is not restricted by the description on the basis of theexemplary embodiments. Rather, the invention encompasses any novelfeature and also any combination of features, which in particularincludes any combination of features in the patent claims, even if thisfeature or this combination itself is not explicitly specified in thepatent claims or exemplary embodiments.

1. A luminous device comprising at least one reflector and comprising atleast one reflector and comprising at least one luminous module whichhas at least one radiation-emitting semiconductor component and acomponent carrier having at least one mounting area on which theradiation-emitting semiconductor component is mounted, wherein theluminous module is connected to the reflector in a connection planedefined by points of contact between the component carrier and thereflector, wherein the mounting area extends obliquely with respect tothe connection plane.
 2. The luminous device as claimed in claim 1,wherein the luminous module is arranged within the reflector.
 3. Theluminous device as claimed in claim 1, wherein a cross-sectional area ofthe reflector which extends parallel to the connection plane becomeslarger in the main emission direction.
 4. The luminous device as claimedin claim 1, wherein the reflector has a symmetrical cross-sectional formin at least one plane arranged perpendicular to the connection plane. 5.The luminous device as claimed in claim 4, wherein the cross-sectionalform is a parabola segment or a parabola, an ellipse segment, ahyperbola segment or a trapezoid segment.
 6. The luminous device asclaimed in claim 1, wherein the reflector is coated with a phosphor. 7.The luminous device as claimed in claim 1, wherein the reflector isformed from a plastic film.
 8. The luminous device as claimed in claim1, wherein the component carrier has at least one first and one secondmounting area (4 a, 4 b) which extend obliquely with respect to oneanother.
 9. The luminous device as claimed in claim 1, wherein thecomponent carrier has at least one circuit board and the mounting areais the surface of the circuit board.
 10. The luminous device as claimedin claim 1, wherein the component carrier has the form of a polyhedron.11. The luminous device as claimed in claim 10, wherein the at least onemounting area is arranged parallel to a boundary face of the polyhedron.12. The luminous device as claimed in claim 1, wherein the componentcarrier is a frame provided for guiding a cooling fluid flow or forarranging a cooling element.
 13. The luminous device as claimed in claim1, comprising a plurality of reflectors, wherein the at least oneluminous module arranged in one reflector is in each case electricallydriveable independently of the luminous modules arranged in the otherreflectors.
 14. The luminous device as claimed in claim 1, wherein acovering plate in the form of a diffuser or a backlighting element inthe form of an LCD is disposed downstream of the reflector.
 15. Theluminous device as claimed in claim 14, wherein the mounting areaextends obliquely with respect to a main area of the backlightingelement.